[REBOL] Re: simple view question

From: brett:codeconscious at: 10-Apr-2001 17:19

First thing to say is that the layout function takes the VID dialect as
input.
A dialect follows a syntax that may be different from "normal" rebol code.

The short answer is VID doesn't handle the print function because print does
not return a value that VID expects.

Going back to why the first example works. Well, read %file.txt returns a
string and VID can use strings.

Probe returns a value - the value that it was given so this works:

    view layout [
         text "hello"
         probe "how do you do"
    ]

and so does this

    view layout [
         text probe "how do you do"
    ]

and so does this

    bizarre-function: does [ for i 1 5 1 [print i] "bizarre function
result"]
    view layout [
        text bizarre-function
    ]

Also note that VID allows a single (once only) evaluation of an arbtrary
expression using the word do

Like this:

    view layout [
         text "hello"
         do [print "how do you do"]
    ]

I hope that helps. Maybe someone else can put it more succinctly.

Regards,
Brett.

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